Unicode Checker

The Unicode Checker analyzes input text to determine encoding validity, detect improper byte sequences, and count code points. It conceptualizes text as a sequence of code points mapped from bytes, enabling a precise assessment of UTF-8, UTF-16, and UTF-32 conformity. The tool highlights where sequences fail to decode, flags surrogate issues, and reports the total number of Unicode code points found. A unique value proposition lies in combining immediate validation with actionable guidance for encoding normalization and conversion. It benefits developers integrating multilingual data, localization teams preparing strings for releases, and editors ensuring downstream compatibility across systems. Core features include real-time validation, code-point counting, and explicit error codes, with optional advanced checks for NFC/NFKC normalization, mixed-encoding detection, and escape sequence validation. The tool provides deterministic outputs that support automated pipelines and manual remediation alike. Typical use cases include validating JSON payloads, ensuring database text fields store properly encoded data, and auditing text extracted from external sources before processing. By surfacing exact invalid sequences and suggested fixes, it reduces data corruption and rework. This approach emphasizes correctness, interoperability, and maintainability in multilingual data workflows.
The tool’s value lies in early detection, standard-compliant guidance, and precise diagnostic data that helps teams deliver reliable text across locales.
Applications range from software localization and content pipelines to data ingestion and API integrations, where Unicode integrity is critical for correct rendering and search/indexing outcomes.